SIgn API for Uploading Transient Documents doesnt work from a web Page

Hi,

I am facing issue while using the REST API for uploading Transient documents. It works well with using POSTMAN tool but not from a web page. I am trying to POST a form data using AJAX/JS/HTML, it throws error one after the other.

Errors :

Would you please help me out? Is someone facing the same issue.

Thanks,

Karthic.R